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LOCATION.-- Lat 42°16'22", long 88°32'58" (NAD of 1927), in SE1/4SE1/4 sec.20, T.44 N., R.6 E., McHenry County, Hydrologic Unit 07090006, at bridge on Garden Valley Road, 2.7 mi north of Union, 3.2 mi northeast of Marengo, and at mile 0.75. |
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DRAINAGE AREA.-- 40.1 mi2. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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PARTIAL RECORD: Annual maximum, water years 1970 to 1978. |
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GAGE.-- Crest-stage gage. Datum of gage is 814.13 ft above NGVD of 1929. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 680 ft3/sec, July 2, 1978, gage height, 3.75 ft. |
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Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |